<template>
	<div class="login_container" :style="'background-image:url('+ Background +');'">
		<div class="login_box">
			<div class="avatar_box">
				<img src="../assets/logo.png" alt="">
			</div>
			<!--			登录表单区域-->
			<el-form :model="loginForm" ref="loginFormRef" :rules="loginFormRules" label-width="80px" class="login_form">
				<!--				用户名-->
				<el-form-item prop="username">
					<el-input v-model="loginForm.username" placeholder="请输入账号" autofocus
										prefix-icon="el-icon-user-solid" autocomplete="off" >
					</el-input>
				</el-form-item>
				<!--密码-->
				<el-form-item prop="password">
					<el-input v-model="loginForm.password" placeholder="请输入密码" show-password
										prefix-icon="el-icon-lock" autocomplete="off" ></el-input>
				</el-form-item>
				<!--				按钮区域-->
				<el-form-item class="btns">
					<el-button type="primary" @click="login">登录</el-button>
					<el-button type="reset" @click="resetForm('loginFormRef')">重置</el-button>
				</el-form-item>
			</el-form>
		</div>
	</div>
</template>

<script>
	import Background from '@/assets/images/background.jpg'

	export default {
		name: "Login",
		data() {
			return {
				Background: Background,
				// 登录保存的对象
				loginForm: {
					username: 'admin',
					password: '123456'
				},
				// 表单的验证规则对象
				loginFormRules: {
					username: [
						 { required: true, message: '请输入登录名称', trigger: 'blur' },
						{ min: 3, max: 10, message: '长度在 3 到 10 个字符', trigger: 'blur' }
					],
			password:[
				{ required: true, message: '请输入登录密码', trigger: 'blur' },
				{ min: 6, max: 15, message: '长度在 6 到 15 个字符', trigger: 'blur' }
			]
				}
			}
		},
		methods: {
			resetForm(formName) {
				this.$refs[formName].resetFields();
			},
			login(){
				this.$refs.loginFormRef.validate( async valid =>{
					if (!valid) return false;
					const res = await this.$http.post("/user", this.loginForm)
					console.log(res)
					if (res.status !== 200) return this.$message.error('登录失败')
					this.$message.success('登录成功')
					// 1、将登陆成功之后的token, 保存到客户端的sessionStorage中; localStorage中是持久化的保存
					//   1.1 项目中出现了登录之外的其他API接口，必须在登陆之后才能访问
					//   1.2 token 只应在当前网站打开期间生效，所以将token保存在sessionStorage中
					window.sessionStorage.setItem('token', res.data.token)

					// 2、通过编程式导航跳转到后台主页, 路由地址为：/home
					 this.$router.push('/home')
				})
			}
		}
	}
</script>

<style scoped>
	.login_container {
		background-color: #2b4b6b;
		height: 100%;
	}

	.login_box {
		width: 450px;
		height: 300px;
		background-color: #fff;
		border-radius: 3px;
		position: absolute;
		left: 50%;
		top: 50%;
		transform: translate(-50%, -50%);
	}

	.avatar_box {
		height: 130px;
		width: 130px;
		border: 1px solid #eee;
		border-radius: 50%;
		padding: 10px;
		box-shadow: 0 0 10px #ddd;
		position: absolute;
		left: 50%;
		transform: translate(-50%, -50%);
		background-color: #fff;
	}

	.avatar_box img {
		width: 100%;
		height: 100%;
		border-radius: 50%;
		background-color: #eee;
	}

	.btns {
		display: flex;
		justify-content: center;


	}

	.login_form {
		position: absolute;
		left: 43%;
		top: 54%;
		transform: translate(-50%, -50%);
		bottom: 0;
		width: 80%;
		/*display: flex;*/
	}
</style>
